Flue filer



Sept. 8, 1931. c. E. FERGUSON ET AL FLUE FILER Original Filed Feb. 28 1930 InvenlorS Patented Sept. 8, 1931 UNITED STATES PATENT oFFicE CARY E. FERGUSON AND CHARLES E. SHOCKENCY, OF LIMA, OHIO FLUE FILER Application filed February 28, 1930, Serial No. 432,275. Renewed. July 6, 1931.

This invention relates to an improved device which is especially designed for filing tubes or flues such as are employed in the construction of steam boilers and the like.

More specifically stated, this flue filing device is associated with the tube shaft of a common flue cutter when said shaft is controlled by a cutter wheel and wherein the structure of the cutter is operated from air,

re electricity, or other power.

In ordinary flue cutting machines of this kind, the flue to be acted on is rotated, and the present invention functions to file off the end of the flue to render it smooth and accurate in finish.

It follows that the primary object is to provide a simple and economical filing device for flue-ends wherein said device is in the nature of a supplemental attachment or appliance susceptible of being employed on a conventional flue cutter.

The specific details and their arrangement and association will become more readily apparent from the following description and drawings.

In the drawings:

Figure 1 is an elevational view of the attachment on the machine.

Figure 2 is a View of the attachment observing it in a direction from left to right in Figure 1.

Figure 3 is a sectional View.

Figure 4 is a fragmentary elevational view showing a portion of the oscillatory operating shaft of the common flue-cutting machine.

In the drawings, the reference character 5 designates a frame bracket which is mounted on the machine. This includes a portion 6 which is constructed at the top as indicated at 7 Bolted to the frame and associated with this part 6 is a complemental section or strap including an attaching portion 8 and a laterally directed end portion 9 and a twisted extremity 10 forming an attaching lug;

In accordance with the invention, a novel fixture is fastened on this lug 10. The fixture comprises a bearing sleeve 11 having an attaching ear 12 pivoted on the lug as indicated at 13. Mounted for rotation in this sleeve is a bushing 14 which as shown in Figure 3 includes a set screw 15 for fastening the files 16 therein. This allows the file and bushing to rotate as a unit in the bearing.

A set screw is provided to lock the bushing in the bearings when desired whereby to permit the wear surface to be regulated and changed from time to time and to prolong the life of the file. Formed on the bearing collar or sleeve 11 is an attaching member 18. This is formed at its opposite ends with eyes 19. and 20 and a depending link 21 is con nected to the 19 and extends down and is connected with acrankarm 22 fastened on the oscillatory cutter shaft 23. Incidentally this part 23 is an existing part of the conventional cutter.

The numeral 2 11 designates a return spring,

which has its lower end fastened to an an F choring hook 25 carried by the frame clamp 5. In practice, the file 16 is located in the path of movement of the end of the boiler tube or flue (not shown). The flue is suspended in rotating relation on the frame of the cutter machine (no-t'shown). Thus, at predetermined intervals of time, the oscillatory shaft 23 oscillates the link 25 and pulls the entire pivoted head structure down to, swing the file across the ends of the tube. The rotating of the tube against the file serves to true and finislroff the end of the flue. Thus the pivoted head structure assumes the normally out of the way position as seen in Fig. 1 but is swung down at intervals to bring it into operative filing position.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size, and rear-' rangementof details coming within the field of invention claimed may be resorted to in actual practice if desired.

We claim 1. In a structure of the class described. in

combination, a stationary frame, a clamp on said frame, a collar pivotally mounted on said clamp, a file mounted in said collar, a return spring anchored on said clamp and fastened to said collar, an oscillatory shaft, and an operating connection between the collar and shaft.

2. In a structure of the class described, in combination, a frame, a clamp including a laterally directed portion, said clamp being fastened on said frame, a pivotally mounted collar on said clamp, a bushing mounted in said collar, a file mounted in said bushing, spring return means connected with the clamp and collar, and intermittently actu- .atedoperating means for said file.

'3. In an attachment of the class described, a clamp including a section having a laterally directed lug, a collar fastened on said lug, a bushlng mounted for rotation in said collar, a set screw for holding said bushing firmly in place, a file removably arranged in said bushing, a set screw for holding said file i-n adjusted position, an actuating brackct carried by said collar, a link connected to one end of the bracket, means for connecting said link with an oscillatory operating shaft, a return spring connected with the opposite end of the bracket, and means for connecting said return spring with said clamp.

4. In a structure of the class described, in combination, a frame, an oscillatory operating shaft mounted beneath said frame, a clamp on said frame, a collar rockably mounted on said clamp, 'a file removably and adjustably mounted in said collar, a bracket carried by said collar, an operating link connection between the bracket and shaft, and a return spring connection between the bracket and the clamp.

In testimony whereof we aflix our signatures.

CARY E. FERGUSON. CHARLES E. SHOCKEN CY. 

